Lamenting Thebian women are waiting for the men to come back from war. God Jupiter is attracted to one of them: Alkmene. He goes to earth and tries to seduce her as himself: an old man. Failing in this, he disguises himself as Amphitryon (Alkemene's husband) and tries again. Next morning Amphitryon and his men come back from war; he suspects adultery and wants a divorce. Jupiter's wive Juno now also comes to earth and clears things up.
